Stupid thing is driving me crazy

Gravity bled the rears again, and still, if I reef on the pedal with the engine running, I can get it to bottom out in the master cylinder. Usually if you have air in the system, you can pump the brakes and the pedal will come up. My pedal does not come up if I pump it, which leads me to think I don't have any air.

My front & rear calipers are the same size as a stock Caddy eldorado which came with a smaller 1 1/8" master cylinder, so I'd think my 1.25" MC should move plenty of fluid.

Did find some guys online recommending a 37mm (1.45") bore master cylinder from an '02 Silverado


If you ever find yourself in a fair fight, your tactics suck.